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142072-65-9

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142072-65-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 142072-65-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,0,7 and 2 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 142072-65:
(8*1)+(7*4)+(6*2)+(5*0)+(4*7)+(3*2)+(2*6)+(1*5)=99
99 % 10 = 9
So 142072-65-9 is a valid CAS Registry Number.

142072-65-9Downstream Products

142072-65-9Relevant articles and documents

Expeditious and Efficient Annulation Protocol for the Synthesis of α,β-Unsaturated δ-Lactones from β-Keto Esters

Nangia, A.,Rao, P. Bheema

, p. 2375 - 2378 (2007/10/02)

β-Keto esters 6a-e are transformed into β-keto alcohols 7a-e, which are homologated to phosphonates 9a-e.Intramolecular Horner-Wadsworth-Emmons reaction affords δ-lactones 10a-d in excellent overall yields. Key words: δ-Lactones; β-Keto esters; Intramolecular; Phosphonates; Horner-Wadsworth-Emmons

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